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Legislation Top 10 Reasons to Use Green Alloys™
Standard-Stocked Alloys

C89844 Lead-Free Replacement for C844

Cast         

  • Product Description: Bismuth Tin Bronze
  • Solids: 1/2"  to 10" O.D.
  • Tubes: 1 1/8" to 9" O.D.
  • Rectangles: Up to 15"
  • Standard Lengths: 144"
  • Shape/Form: semi-finished, mill stock or near-net shapes, anode, bar stock, billet/bloom, squares, hex, plate, profile or structural shape, flats/rectangular bar
  • Compliance: C89844 is compliant with key legislation including (1) Federal Safe Drinking Water Act 1974 &mdash SDWA, (2) Federal Reduction of Lead in Drinking Water Act 2011 and (3) California AB1953
  • » C89844 Spec Sheet (.pdf)

Typical Uses

  • Plumbing fittings/valves for potable water

Chemical Composition

Cu% Pb% Sn% Zn% Fe% P% Ni%1 Al% Bi% S% Sb% Si%
  • Chemical Composition provided by CDA

  • 1Ni value includes Co.
  • Note: Cu + Sum of Named Elements, 99.3% min. Single values represent maximums.
83.00-
86.00
 
0.20
3.00-
5.00
7.00-
10.00
 
0.30
 
0.05
 
1.00
 
0.005
2.00-
4.00
 
0.08
 
0.25
 
0.005

Machinability

Copper Alloy UNS No. Machinability Rating Density (lb/in3 at 68 °F)
C89844 70 0.31

Mechanical Properties

Tensile Strength, min Yield Strength, at 0.5% Extension Under Load, min Elongation, in 2 in. or 50 mm min Brinell Hardness (500 kg load) Remarks
ksi MPa ksi MPa % typical BHN  
28 193 13 90 5 55  

Physical Properties

  US Customary Metric
  • Physical Properties provided by CDA
Melting Point - Liquidus 1850 °F 1010 °C
Melting Point - Solidus 1550 °F 853 °C
Density 0.31 lb/in3 at 68 °F 8.58 gm/cm3 at 20 °C
Specific Gravity 8.58 8.58
Electrical Conductivity 16.8% IACS at 68 °F 0.095 MegaSiemens/cm at 20 °C
Thermal Conductivity 46.7 Btu/sq ft/ft hr/°F at 68 °F 80.9 W/m at 20 °C
Coefficient of Thermal Expansion 68-392 10 · 10-6 per °F (68-392 °F) 17.3 · 10-6 per °C (20-200 °C)
Specific Heat Capacity 0.08 Btu/lb/°F at 68 °F 335.2 J/kg at 20 °C
Modulas of Elasticity in Tension 13000 ksi 89622 MPa

Fabrication Properties

  • Fabrication Properties provided by CDA

  • *Since brazing is performed within the hot-short range, strain must be avoided during brazing and cooling.
Technique Suitability
Soldering Excellent
Brazing* Good
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Not Recommended
Coated Metal Arc Welding Not Recommended
Machinability Rating 70

Thermal Properties

Treatment Value* Time**
  • Thermal Properties provided by CDA

  • *Temperature is measured in Fahrenheit. **For Stress Relief, Solution Treatment and Annealing - Time is measured in hours/inch of thickness. For Precipitation Heat Treatment - Time is measured in hours.
Stress Relief 500  
Solution Treatment   0